A method and system for optimizing tolerance of K&C characteristics of automobile suspension

Abstract

The invention provides an automobile suspension K&C characteristic tolerance optimization method. The method includes: building a chassis kinetic model according to each coordinate in a hard spot table, and building a first correlation between suspension hard spot tolerance and suspension K&C characteristic tolerance; analyzing the tolerance of the coordinates of key hard spots, and building a second correlation between the suspension hard spot tolerance and part tolerance; according to the first correlation and the second correlation, acquiring the third correlation between the suspension K&C characteristic tolerance and the part tolerance, and acquiring the influence quantity representing the influence of each part tolerance on the suspension K&C characteristic tolerance; when the accumulated tolerance of the suspension K&C characteristic tolerance exceeds a preset tolerance range threshold, prompting that design alteration needs to be performed on part structures or tolerance with high influence quantity so as to allow the final accumulated tolerance to be located within the preset tolerance range threshold. The invention further provides a corresponding system. By the automobile suspension K&C characteristic tolerance optimization method, development time can be shortened evidently, and cost can be saved.

Description

technical field [0001] The invention relates to the technical field of automobile chassis, in particular to an automobile suspension K&C characteristic tolerance optimization method and system. Background technique [0002] The kinematics characteristics (Kinematics, referred to as K characteristics) and dynamic characteristics (Compliance, referred to as C characteristics) of the suspension are collectively referred to as the K&C characteristics of the suspension. The change of the wheel alignment parameters caused by C; the C characteristic is the elastic characteristic of the suspension, which characterizes the change of the wheel alignment parameters due to the elastic deformation of the rubber bushing and the guide rod system when the suspension is subjected to external force. [0003] Suspension K&C characteristics are a relatively comprehensive evaluation of whether the suspension can meet the requirements of vehicle handling and stability characteristics. [0004] A...

AI Technical Summary

Problems solved by technology

In order to obtain the tolerance performance of K&C characteristics on real vehicles, it is necessary to conduct K&C tests on a large number of real vehicles, which is not only time-consuming and laborious, but also has low operability. Tolerances are correlated to evaluate and optimize the tolerances of suspension K&C characteristics

[0005] On the other hand, waiting until the actual vehicle verification stage to optimize the tolerance of the suspension K&C characteristics is also a great challenge and waste to the development cycle and cost

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